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Greetings People. I am using two ADS805 devices, each in the configuration shown in figure 7 in the data sheet (Single ended DC coupled input between 0 and +5V). My sample clock is running at 5MHz. The problem is the parts are claiming a DC offset. I shorted both parts' +in pins to ground. One device is showing 0x10f and the other one is showing 0x118. This corresponds to 331mV and 343mV. Has anybody else seen this?
Thanks for looking at this.
Len
Hi,
Thanks for letting us know it was resolved. I was just going through the datasheet and calculating the typical and max offset in terms of output codes and mV from the % values that are specified in the datasheet, and saw that the offsets you were seeing was indeed excessive. But I couldn't see a reason why they should be, so I am glad it is resolved.
Regards,
Richard P.